chromium/chrome/android/webapk/shell_apk/res_template/mipmap-nodpi/maskable_app_icon.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2024 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@mipmap/maskable_app_icon_{{{icon_density}}}"
  {{#primary_icon}}
    iconUrl="{{{icon_url}}}"
    iconHash="{{{hash}}}"
  {{/primary_icon}}
/>